Matter Matters!
What is Matter?
Anything that has mass and takes up space.
What is a physical property?
A characteristic of matter that can be observed or measured.
What tool measures temperature?
A thermometer.
What type of change occurs when an ice cube melts?
A physical change, specifically a phase change.
What is the most important result of a chemical change?
One or more new substances are formed.
What are the three states of matter?
Solid, liquid, and gas.
Name three physical properties of matter.
Any three: color, shape, size, texture, hardness, volume, conductivity, magnetism, or solubility.
What unit is used to measure temperature in our science class?
Degrees Celsius (°C).
What is the main difference between a physical change and a chemical change?
A physical change does not create a new substance; a chemical change produces one or more new substances.
Name two possible signs of a chemical reaction.
Any two: color change, gas production, new odor, heat absorbed or released, or formation of a new solid.
Which state of matter has a definite shape and particles that vibrate in place?
Solid.
What physical property describes how much space an object takes up?
Volume.
What tool would you use to measure the volume of a liquid?
A graduated cylinder.
A metal can is crushed. Is this a physical or chemical change? Explain.
Physical change. Only the shape changes; no new substance forms.
An apple turns brown after being cut. What type of change does the browning indicate?
Chemical change.
How are particles arranged in a gas?
They are far apart and move freely.
What property describes a material's ability to carry heat or electricity?
Conductivity.
What units can be used to measure liquid volume?
Milliliters (mL) or liters (L).
Water vapor cools and turns into liquid water. What is this process called?
Condensation, a physical change. (Phase change)
Two clear liquids are mixed. Bubbles form and a new solid appears. What type of change is likely happening? Explain.
Chemical change. Gas production and the formation of a new solid are evidence that new substances may have formed.
When liquid water evaporates, what happens to its particles?
They gain energy, move faster, and spread farther apart as water becomes a gas.
A material dissolves easily in water. What physical property does this demonstrate?
Solubility.
A student needs to measure the mass of a rock. What tool and unit should they use?
A balance and grams (g).
A marshmallow is burned. What type of change occurs, and how do you know?
Chemical change because new substances form during burning.
A student says, 'Melting ice is a chemical change because it changes from a solid to a liquid.' Explain why the student is incorrect.
Melting is a physical change because the substance is still water. Changing states does not produce a new substance.